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From: Junio C Hamano <gitster@pobox.com>
To: Phillip Wood <phillip.wood@talktalk.net>
Cc: Git Mailing List <git@vger.kernel.org>,
	Ævar Arnfjörð Bjarmason  <avarab@gmail.com>,
	Igor Djordjevic <igor.d.djordjevic@gmail.com>,
	Phillip Wood <phillip.wood@dunelm.org.uk>
Subject: Re: [RFC PATCH v5 2/4] add -p: select modified lines correctly
Date: Thu, 26 Jul 2018 12:30:38 -0700
Message-ID: <xmqqmuudpzfl.fsf@gitster-ct.c.googlers.com> (raw)
In-Reply-To: <20180726155854.20832-3-phillip.wood@talktalk.net>

Phillip Wood <phillip.wood@talktalk.net> writes:

An interesting problem you are solving ;-)

> For example given the hunk
>       1 -* a longer description of the
>       2 -  first item
>       3 -* second
>       4 -* third
>       5 +* first
>       6 +  second item
>       7 +* the third item
>
> If the user selects 1,2,4–5,7 then we should generate
> 	-* a longer description of the
> 	-  first item
> 	+* first
> 	 * second
> 	-* third
> 	+* the third item

I understood this example as "3 that is removal and 6 that is
addition are excluded---we consider that these two lines (one in the
pre-image and the other in the post-image) are _matching".  As we
are excluding a deletion, it becomes the common context line, and
any removal or addition that appear before that must stay to happen
before the common context line (i.e. removal of 1 and 2, and
addition of 5, both precede common context line "second") and any
removal or addition that appear after that must stay after the
common context (i.e. removal of "third" and addition of "the third
item" come after "second").

But then it is not clear to me what you mean by "group" below.  What
groups does the above example have?  Ones before the retained
"second" (i.e. removal 1, 2, 4 and addition 5) form one group and
ones after it (i.e. removal 4 and addition 7) form another group?

> Reported-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>

Is this fixing any bug?  I usually see "Reported-by" only for a
bugfix patch but this seems to be adding a new feature (and lack of
feature is usually not a bug).

  reply index

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-02-19 11:36 [PATCH v1 0/3] add -p: select individual hunk lines Phillip Wood
2018-02-19 11:36 ` [PATCH v1 1/3] " Phillip Wood
2018-02-19 11:36 ` [PATCH v1 2/3] add -p: allow line selection to be inverted Phillip Wood
2018-02-19 11:36 ` [PATCH v1 3/3] add -p: optimize line selection for short hunks Phillip Wood
2018-02-19 12:20 ` [PATCH v1 0/3] add -p: select individual hunk lines Gustavo Leite
2018-03-06 10:17 ` [PATCH v2 " Phillip Wood
2018-03-06 10:17   ` [PATCH v2 1/3] " Phillip Wood
2018-03-06 20:29     ` Igor Djordjevic
2018-03-06 21:33       ` Igor Djordjevic
2018-03-06 10:17   ` [PATCH v2 2/3] add -p: allow line selection to be inverted Phillip Wood
2018-03-06 19:57     ` Junio C Hamano
2018-03-08 11:05       ` Phillip Wood
2018-03-08 17:53         ` Junio C Hamano
2018-03-13 12:06           ` Phillip Wood
2018-03-13 16:32             ` Junio C Hamano
2018-03-14 11:02               ` Phillip Wood
2018-03-06 20:41     ` Igor Djordjevic
2018-03-06 10:17   ` [PATCH v2 3/3] add -p: optimize line selection for short hunks Phillip Wood
2018-03-06 20:33     ` Igor Djordjevic
2018-03-06 20:19   ` [PATCH v2 0/3] add -p: select individual hunk lines Igor Djordjevic
2018-03-06 21:03     ` Junio C Hamano
2018-03-06 21:20       ` Igor Djordjevic
2018-03-16 10:13 ` [PATCH v3 " Phillip Wood
2018-03-16 10:13   ` [PATCH v3 1/3] " Phillip Wood
2018-03-16 10:13   ` [PATCH v3 2/3] add -p: allow line selection to be inverted Phillip Wood
2018-03-16 10:13   ` [PATCH v3 3/3] add -p: optimize line selection for short hunks Phillip Wood
2018-03-29 18:32   ` [PATCH v3 0/3] add -p: select individual hunk lines Junio C Hamano
2018-03-30 11:09     ` Phillip Wood
2018-03-31 19:20       ` Ævar Arnfjörð Bjarmason
2018-04-02 10:55         ` Phillip Wood
2018-04-02 11:39           ` Ævar Arnfjörð Bjarmason
2018-07-26 10:22 ` [RFC PATCH v4 0/4] " Phillip Wood
2018-07-26 10:22   ` [PATCH v4 1/4] " Phillip Wood
2018-07-26 10:22   ` [RFC PATCH v4 2/4] add -p: select modified lines correctly Phillip Wood
2018-07-26 10:22   ` [PATCH v4 3/4] add -p: allow line selection to be inverted Phillip Wood
2018-07-26 10:22   ` [PATCH v4 4/4] add -p: optimize line selection for short hunks Phillip Wood
2018-07-26 15:58 ` [RFC PATCH v5 0/4] add -p: select individual hunk lines Phillip Wood
2018-07-26 15:58   ` [PATCH v5 1/4] " Phillip Wood
2018-07-26 19:36     ` Junio C Hamano
2018-07-27 10:05       ` Phillip Wood
2018-07-27 16:09         ` Junio C Hamano
2018-07-26 15:58   ` [RFC PATCH v5 2/4] add -p: select modified lines correctly Phillip Wood
2018-07-26 19:30     ` Junio C Hamano [this message]
2018-07-27 10:19       ` Phillip Wood
2018-07-27 16:14         ` Junio C Hamano
2018-07-26 15:58   ` [PATCH v5 3/4] add -p: allow line selection to be inverted Phillip Wood
2018-07-26 15:58   ` [PATCH v5 4/4] add -p: optimize line selection for short hunks Phillip Wood
2018-07-27 18:27   ` [RFC PATCH v5 0/4] add -p: select individual hunk lines Ævar Arnfjörð Bjarmason
2018-07-28 10:08     ` Phillip Wood
2018-07-28 12:40   ` Ævar Arnfjörð Bjarmason
2018-08-03 10:01     ` Phillip Wood
2018-08-03 16:51       ` Junio C Hamano
2018-08-03 17:59       ` Ævar Arnfjörð Bjarmason

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